that it is impossible to remember the characteristics of all of them without an adequate system of classification. Moreover, new varieties are constantly coming into commerce, and it is necessary that growers should understand what relationship they bear towards standard varieties, and to which type they most nearly approximate. The system of classification must be adequate for this purpose, must be complete and accurate, and with emphasis on the essential features of each variety. The essentials of a classification are as f o l l o w s : (1). The main distinctions must be well defined and constant. (2). The potato is a commercial plant. The classification must indicate the commercial type of the variety. (3). The main group divisions must be few in number. (4). The classification must be logical and constant throughout. Reference was made to the work of the Synonym Committee in discouraging the re-naming of varieties. In this connection, it was mentioned that natural seedlings of Ally, Abundance, Majestic and Templar have been found which are anatomical replicas of the parent types. Some of these seedlings have proved susceptible to wart disease. The details of the classification can be seen from the annexed key. The first division is that of matur i ty; the second, colour of sprout; the third, colour of skin ; the fourth, shape of tuber ; the fifth, colour of flower. The colour of the sprout can be inferred during the growing season from the following characteristics: (1). All plants having red purple flowers have pink sprouts. (2). All plants having blue purple flowers have blue sprouts. (3). The colour of the sprout corresponds to any colour on the tuber itself, including the tiny scale leaves about the eyes, or on the underground runners (or stolons). The supreme importance of foliage characteristics in the identification of varieties was explained. Reference was made to the Board's publication on this subject, namely, "The Maintenance of Pure and Vigorous Stocks of Varieties of the Potato." It was shown how the descriptions in this publication were applied to selected samples in the field. Haulms and tubers were shown, and the points of distinction explained. In addition it was shown, also by reference to actual samples, how these selected varieties differed f rom the principal rogues found in the stocks.